New Norton knocking help please

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When you say away from direction of rotation..
To Retard the ignition you turn the points/EI pick up mounting plate with Camshaft rotation
To Advance you go against camshaft rotation
In the case of the Norton to retard the timing you turn the plate anti clockwise
Thank you.
 
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Never known plug gaps as high as 35 thou, reduce them to 25thou but sounds like ignition timing
 

DogT

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Some Citgo stations handle racing fuel. I've been using 110LL, no knockin (pinging or pre-ignition) here. But like others have said, it's probably the timing. The blue stuff runs great, I use it in all the 2 stroke yard equipment except the mower which runs fine on regular.
 
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Thanks again guys for all the reply’s!!! You have all been a wealth of knowledge that I will put to use. Going to set timing Friday...shit is always popping up that distracts me from getting her done. I will let you know what I find out and if it’s gone. Thanks again. Nate.
 
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Never known plug gaps as high as 35 thou, reduce them to 25thou but sounds like ignition timing
I was thinking the same when I read that, ran a Boyar EI most of my Norton life and the plugs were always set at 25thou, now running the Joe Hunt Maggie the plus are set at 18thou as pre JH instructions, I thought 35thou was a wee bit to much.

Ashley
 
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Throttle stop to set ground idle, Like a Mikuni carb dial you turn with a screw driver or hand. The Amal Mkii

I found it. as stated before, I’m used to mikunis big idle ”throttle stool screw. Thanks much.
 
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Ran bike up to 4500 and timing was around 36 but then moved timing plate CC then would go to 40
.
 

maylar

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Ran bike up to 4500 and timing was around 36 but then moved timing plate CC then would go to 40
Something's not right. Rotating the sensor plate CCW should decrease the advance. And 36° @ 4500 is way too high.
 
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Gonna try again. White dots are lined on plate and correct Tdc * the directions say to roatate rotor if cannot time correctly
 
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So, whats the differance between a 750 Commando and a 1960s Atlas?
I set my Atlas up at 28 degrees on 10:5 to1 pistons and never had any pinging, unlike a 500 single which I had which did, because an idiot of a petrol pump attendant filled it up with the wrong octane gas, resulting in a chewed up piston.
31 is too far advanced unless you still have those dished 7.5 :1 pistons .
 
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IMO you are going the wrong way, full advance at 5000 rpm should be 28, and when its retarded possibly 31, at 1000 rpm.
 

maylar

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31 is too far advanced unless you still have those dished 7.5 :1 pistons .
Stock timing with points was 28° @ 3000. The advance was full on by 2800 IIRC. Electronic ignitions impliment advance electronically, and the Boyer specs 31 @ 5000.
 
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adjusted stator plate to max retard and it’s at 38* Boyer directions say adjust stair rotor to get more retard
 
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adjusted stator plate to max retard and it’s at 38* Boyer directions say adjust stair rotor to get more retard
OK, you're not going to like this suggestion, but I wonder how many degrees the timing plate that aligns with the mark on the alternator is incorrect. I say "how many degrees" rather than "if" because I don't think I've ever seen one that's perfectly accurate. Checking is a little fiddly and takes a while (and is probably impossible without a degree wheel and care to get it right), but every Commando should be checked. On a stock (non-Combat) engine with points, a few degrees probably didn't matter but with unknow compression and an electronic ignition, you can easily get to combination where accurate ignition timing is critical.
 

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